Automatic mixing and antiscai



H. L. YOUNG AND M. S. FINCH. AUTOMATIC MIXING AND ANTISCALDING VALVE.

' APPLICATION FILED FEB. 25.19I6. 1,308,829. PatenIed'July 8,1919.

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i e UNITED STATES PATENT OFFICE.

HARRY Ia. YOUNG lAN'D MAURICE S. FINCH, OF ST. JOSEPH, MISSOURI.

AUTOMATIC MIXING AND ANTISCALDING- VALVE.

Specification of Letters Patent.

' Patented July 8, 1919.

Application'led February 25, 1916. Serial No. 80,371.

To all 'whom t may concern.'

Be it known that we, HARRY L. YOUNG and MAURICE S. FrNoH, citizens ofthe .United States, residing at St. Joseph, in the county of Buchananand State of Missouri,

have invented certain new and useful Improvements in Automatic Mixingand Antifscal ling Valves, of which the following is a specification,reference being had therein to the accompanying drawing.

Our invention relates' to improvement-s in that class of mixing valves,which are used for mixing cold water and steam or for mixing cold andhot water, in providing water, heated to various temperatures, for

. scrubbingV floors, bathing, and all other purposes, where heated wateris used. The objects of our improvements are, first; to provide avalveof this class, by the use of which, cold water and the heatingagent Y can be mixed in any desired proportions,

second: to provide automatic shut-off mechalnism for the heating agent,whereby the latterl is kept shut off, until cold water is {iowing, underpressure, through the valve, and whereby said heating agent isautomatically shutoff, in an'instant, whenever said cold "water thus`ceases to flow, thereby preventing the burning of hose, leading fromthe valve, and the scalding of persons, on whom the water is flowing,third: to soform and a1"- -range the liquid conducting passages, thatthere shall be no backflow of liquid therejthrough, nor direct impact ofthe heating :agent against the cold water, and' vice versa, regardlessof the initial pressures of the same, therebypreventing the `concussionand jar'in the valve, which" is commonly called f water hammer, fourth:to so constructthe valve, that the Coldwater and the heating agent areprevented from reaching each i other, until `=they reach themixingchamber.

I attain these objects by the mechanism illustrated in the accompanyingdrawing, inwhich Figure 1 is a longitudinal section, embodying theVinvention cut on the line X, X,

i -seen in Fig. 2, looking toward the right.

Fig. 2'isa plan view of the valve. Fig. 3 is a transverse section of thevalve piston, on the line Y Y, seen in Fig. 1, looking toward `the left.Figs. 4 and 5 are detail views of the valvesand their cams, lookingtoward the right, showing the same in two positions.

Fig. 6 is a similar view in detail showing oneof` the other variousforms in which the cold water controlling cam may be made. Fig. 7 is aside view of the sleeve coupling certain parts being broken away.

Referring to Fig. 1, valve body 1 has water inlet connection 2, valvechamber 3, steam inlet connection 4, steam valve chamber 5, mixingchamber 6, and outlet connection 7, formed therewith, through the latterof which, the hereinafter described mixture of water and steam isdischarged.

Valves 3 and 5 are actuated by springs 3 and 5, respectively, to closetheir respective valve openings. Said valves have stems 10 and 11respectively, formed therewith.

Said stems are respectivel guided in the apertured stem guides 12 and13.

Water valve 3 is raised by rotation of lcamv 14, which is formed withthe inner ment limited by stops 20 and 20', which are formed on theouter surface of packing box 16, as seen in Fig. 2.

Valve piston 2,1, (see Fig. 1,) is slidably land rotatably'mounted inpiston chamber 22,`and is actuated by spring 23, to close the upper endof water passage 24. Said piston has sleeve 21 formed therewith, whichlatter has stem 25 formed on the end thereof.' Cam 26 is -formed on theend of said stem, and is thereby carried into and from active position,with relation to valve stem 11. Said stem is slidably and rotatablymounted in an aperture formed through partition 26 whichis formed withbody 1, betweenchamber 22 and steam cam chamber 26, which latter isformed in body 1.

Sleeve 21 has an annular countersink 27 formed therein, in which theannular end portion 15 of shaft 15 is slidably guided. The adjacentportion 15 of said shaft is of rectangular form, (see Figs. 3 and 7,)which latter portion is slidable in slot 21, which slot is formed insaid sleeve. The shouldered portion 15a of shaft 15 limits thepreviously described, spring actuated lmovement of piston 21. A

.Said slotted sleeve and the rectangular portion of said shaft which isengaged there- Y with, form a slidable drive coupling, whereby saidshaft rotates said sleeve and the therewith connected parts. Y

Chamber 26 and mixing chamber 6 are connected by steam kpassage 28, thetransverse `area of which gradually increases in size, from chamber 26to its outlet end, for purposes hereinafter described.

The central portion '24 `of water passage 24 is formed of reducedtransverse :area for the same reasons. Y

l/Vater inlet .connection 2 is connected withl a source of water underpressure, by pipe 2, while steam inlet connection 4 is connected with asource 'of steam under pressure, by pipe 4.

Since said sources ofsteam and water may be of any well known kind, theyand their connection are neither shown nor described.

Outlet connection 7 is adapted to have a hose nipple connectedtherewith, for :attaching hose thereto, or to have a pipe connectedtherewith, for conducting the heated water` from the described valve, toany -desired point. Y

In operation, with the partsin the position seen inFigs. 1, 2 and l4,the operator of the valve, manually rotates handle 19, clockwise,thereby rotating cams 14 and v26 from the positions seen in Fig. 4, tothe positions seen in Figo.

During this movement, cam 14 moves stem 10 and the therewith lformedvalve 3, opening said valve and admitting water (not shown,) fromchamber 3 into ychamber 22.

The water thus admitted, moves piston21 from the position seen inFig."1,overcoming vspring 23, :and opening passage 24. Said water thenpasses through :reduced `portion 24 of said passage, under fullpressure, .and moves more slowly through the larger, 4lower end portionof said passage, `and thence into mixing chamber 6. The thus maintainedfull water pressure in portion 24 of passage 24, forms lresistanceagainst back-.flow of steam therein, as hereinafter described, and alsomaintains a suficient amount of pressure of water in chamber 22, to holdpiston` 21in its described position. Y

This vmovement of said piston and the therewith formed piston stem l25:and-cam 26, carries said I'cam into active position, with relation tovalve stem 11. it will be seen and'understood 'from the foregoing, thatIcam 26 is held `from its active position, by pressureo-fspring 23against @piston 21until said spring isoverco'me, fas. stated, and alsothat should supply of water fail from any cause, the resulting lack ofhydraulic pressure against piston 21, would liberate said spring, thepressure of which would move vsaid piston from its described position,tothe Vposition seen in Fig. 1, thereby moving cam 26 from its describedactive position to the position shown. y This arrangement of devices atall times, renders said cam inactive and prevents the opening and theholding open thereby, of the steam inlet valve 5, (as hereinafterdescribed,) except while water is in chamber 22 under pressure, and ispassingV therethrough; which prevents burning of hose and scalding ofpersons, as ystated in the objects.

Continued rotation of handle 19, until Vstopped by stop 20', rotatescams 14 and 26, the latterV of which continues to hold stem 10 and thetherewith formed valve 3 in their described raised position, while cam26 raises steml 11 and the therewith formed valve 5, which admits steamfrom chamber 5,*into chamber 26, from-whence said steam passes intosteam passage V28, under full l pressure. Said steam gradually expandsto a lower pressure in passing through the gradually increased bore ofsaid passage, until the larger end ofV said passage is reached, wherelsaid steam `unites with the previously mentioned water, in mixingchamber 6.

It will be understood that said steam upon :thus uniting with saidwater, is thereby condensed and heats saidV water, land Vthat theconductors e at reduced pressures, `in streams, .inclinedV tow-ard eachother, as directed by their :respective passages, causes said streams touni-te, without causing `what is commonly .called water-hammer, whichVis frequently experienced in the use of valves of thisclass.

Reverse rotation of `handle 19, from stop 20 to stop 20, -liberates-val-ves'5 and3, in the -order named, upon `which their :respecftivesprings 5 andf3, (assisted bythe pres-V sures Vof -said steam andiwaterg) VYclose said lvalves. n

While we have shown and described the `water controlling cam '14, in theforegoing manner, it is evident that said cam could be y Vjusting theheat of the water,

vrotating handle 19, seen in Fig. 1. Since all kfor allowing made invarious forms, for controlling the serve the right to do.

One of such other forms of water controlling cams is shown in Fig. 6, inwhich cam 14 has the sloped face 14: formed thereon, stem 10 and thetherewith formed Water controlling valve 3 to be vgradually closed, forgradually stopping the flow of Water therepast, which results in ahotter mixture in mixing chamber 6, seen in Fig. 6. This form of cam isdesirable where i y the heating agent is hot Water instead of steam, andespecially Where said heating agent has not been heated to a suiicientlyhigh degree. It also provides means for adby adjustably of theunmentioned parts seen in Fig. 6, are the same 1n construction andoperation as Y the previously described parts, said unmentioned partsare designated as previously pointed out, and further description of thesame is deemed unnecessary.

Having fully described o ur invention, what we claim as new, and deslreto secure Vby Letters Patent, is

In a mixing and anti-scalding valve; a

y" valve body; a mixing chamber formed with .30. said mixing chamber; apiston chamber in said body; an outlet directly connected With saidvalve body; a water passage connecting said piston chamber ber; a pistonvalve slidably mounted in said piston chamber a spring for with saidmixing chamand rotatably `copies of this patent may be obtained for saidpiston chamber, said valve being pro- Y vided with a stem therefor; asteam cam chamber connected with said mixing chamber; a steam inletvalve for admittin a heating agent into said steam cam cham er saidvalve having a stem therefor; a steam cam in said chamber said cam beingformed with said piston valve and being thereby normally held out ofactive position with relation to the last mentioned valve stem; a handleon the extended end of said cam shaft whereby the same is rotated; and acaml on said shaft beneath the stem of said Water inlet valve, said cambeing so timed in relation to said steam cam that said water inlet valveis fully opened before said steam cam becomes operative.

In testimony whereof we affix our signatures in the presence of twowitnesses.

HARRY L. YOUNG.

MAURICE S. FINCI-I.

Witnesses:

ISAAC I-I. HOWARD, LENA P. BoxnLL.

tive cents each, by addressing the Commissioner of Patents, Washington,D. C.

